I have a 5g FULL of cherry shrimp, the only plant is java moss, I don't dose it, and I was constantly pulling out hair algae (or thread ?) that the RCS won't touch. I never fed them for the first several weeks until I realized that they weren't eating the algae at all. Finally the java moss exploded and it must be outcompeting the algae, because it's completely gone, but I;m sure it wasn't because of the RCS. So from my experience RCS just don't eat algae, or maybe the appetite for algae varies between strains of RCS!?